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Coldest beach in Louisiana in September

82 coastal locations in Louisiana ranked by their typical September sea temperature. State-wide average in September: 29.2°C.

Coldest in September

Comfort Island, Louisiana

28.9°C

State September average

29.2°C

across 82 coastal locations in Louisiana

Vs annual mean

+5.5°C

above the year-round state average

What the Louisiana water feels like in September

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

Louisiana monthly average 15.6°C to 30.7°C
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  • Warmest month August 30.7°C
  • Coldest month January 15.6°C
  • Annual mean 23.7°C
  • Months above 20°C 8 of 12

Where September fits in the year

September sits inside the state pattern shown on the left. Browse a different month for a fresh ranking.

Louisiana sea temperature map (live)

Today's reading at every Louisiana beach we track. The list below uses the typical September mean from a decade of daily history.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest Louisiana beaches in September

Sorted by typical September mean. Click any beach for the full location page.

# Location September mean
1 Barataria Pass, Louisiana Louisiana 29.2°C
2 Bayou Rigaud, Grand Isle, Barataria Bay, Louisiana Louisiana 29.2°C
3 Caminada Pass (bridge) Louisiana 29.2°C
4 Cocodrie, Terrebonne Bay Louisiana 29.2°C
5 Cote Blanche Island, West Cote Blanche Bay, Louisiana Louisiana 29.2°C
6 Cypremort Point Louisiana 29.2°C
7 East Isle Dernière, Lake Pelto Louisiana 29.2°C
8 East Timbalier Island, Timbalier Bay Louisiana 29.2°C
9 Golden Meadow, Plaisance Canal Louisiana 29.2°C
10 Grand Isle River Delta (2) Louisiana 29.2°C
11 Grand Isle River Delta Louisiana 29.2°C
12 Independence Island, Barataria Bay, Louisiana Louisiana 29.2°C
13 Leeville, Bayou Lafourche Louisiana 29.2°C
14 Lighthouse Point, Atchafalaya Bay, Louisiana Louisiana 29.2°C
15 Lighthouse Point Louisiana 29.2°C
16 Manilla, Barataria Bay, Louisiana Louisiana 29.2°C
17 Mendicant Island, Barataria Bay Louisiana 29.2°C
18 Pelican Islands, Timbalier Bay, Louisiana Louisiana 29.2°C
19 Point Chevreuil, Atchafalaya Bay, Louisiana Louisiana 29.2°C
20 Port Fourchon, Belle Pass Louisiana 29.2°C
21 Quatre Bayous Pass, Louisiana Louisiana 29.2°C
22 South Pass Louisiana 29.2°C
23 Southwest Pass, Vermilion Bay, Louisiana Louisiana 29.2°C
24 Texaco Dock, Hackberry Bay Louisiana 29.2°C
25 Pilot Station, Southwest Pass Louisiana 29.2°C
Show 25 more ▸
26 Pilots Station (east), Southwest Pass Louisiana 29.2°C
27 Southwest Pass, Mississippi River, Louisiana Louisiana 29.2°C
28 Bastian Island, Louisiana Louisiana 29.2°C
29 Baton Rouge Louisiana 29.2°C
30 Empire Jetty, Louisiana Louisiana 29.2°C
31 Mandeville Louisiana 29.2°C
32 New Orleans Louisiana 29.2°C
33 Devon Energy Facility Louisiana 29.2°C
34 Joseph Bayou, Mississippi River, Louisiana Louisiana 29.2°C
35 Lonesome Bayou (Thomasin), Louisiana Louisiana 29.2°C
36 North Pass, Mississippi River, Louisiana Louisiana 29.2°C
37 Pilottown Louisiana 29.2°C
38 Port Eads, South Pass, Mississippi River, Louisiana Louisiana 29.2°C
39 Port Eads Louisiana 29.2°C
40 Southeast Pass, Mississippi River, Louisiana Louisiana 29.2°C
41 Jack Bay, Louisiana Louisiana 29.1°C
42 Olga Compressor Station, Grand Bay Louisiana 29.1°C
43 Venice, Grand Pass Louisiana 29.1°C
44 Breton Islands, Louisiana Louisiana 29.1°C
45 Bay Gardene, Louisiana Louisiana 29.1°C
46 Chandeleur Light, Louisiana Louisiana 29.0°C
47 Grand Pass Louisiana 29.0°C
48 Comfort Island, Louisiana Louisiana 28.9°C
49 The Rigolets, U.S. Highway 90 Louisiana 28.9°C
50 Shell Beach, Lake Borgne Louisiana 28.9°C

Warmest 10 in Louisiana in September

Same data flipped. The warmest spots in the state for this month.

# Location September mean
1 Bulk Terminal Louisiana 29.4°C
2 Calcasieu Pass, East Jetty Louisiana 29.4°C
3 Calcasieu Pass, Lighthouse Wharf, Louisiana Louisiana 29.4°C
4 West Bank 1, Bayou Gauche Louisiana 29.3°C
5 Lake Charles, Calcasieu River Louisiana 29.3°C
6 Mermentau River entrance, Louisiana Louisiana 29.3°C
7 Cameron Louisiana 29.3°C
8 Holly Beach Louisiana 29.3°C
9 Ship Shoal Light, Louisiana Louisiana 29.3°C
10 Freshwater Canal Locks Louisiana 29.3°C

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